Jingyue Wu 8be5600f0a [SROA] Fold a PHI node if all its incoming values are the same ...

Summary:
Fixes PR20425.

During slice building, if all of the incoming values of a PHI node are the same, replace the PHI node with the common value. This simplification makes alloca's used by PHI nodes easier to promote.

Test Plan: Added three more tests in phi-and-select.ll

Reviewers: nlewycky, eliben, meheff, chandlerc

Reviewed By: chandlerc

Subscribers: zinovy.nis, hfinkel, baldrick, llvm-commits

Differential Revision: http://reviews.llvm.org/D4659

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216299 91177308-0d34-0410-b5e6-96231b3b80d8

2014-08-22 22:45:57 +00:00

..

Hello

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InstCombine

InstCombine: Don't unconditionally preserve 'nuw' when shrinking constants

2014-08-22 17:11:04 +00:00

Instrumentation

[dfsan] Fix non-determinism bug in non-zero label check annotator.

2014-08-22 01:18:18 +00:00

IPO

Move some logic to populateLTOPassManager.

2014-08-21 20:03:44 +00:00

ObjCARC

Repace SmallPtrSet with SmallPtrSetImpl in function arguments to avoid needing to mention the size.

2014-08-21 05:55:13 +00:00

Scalar

[SROA] Fold a PHI node if all its incoming values are the same

2014-08-22 22:45:57 +00:00

Utils

Use DILexicalBlockFile, rather than DILexicalBlock, to track discriminator changes to ensure discriminator changes don't introduce new DWARF DW_TAG_lexical_blocks.

2014-08-21 22:45:21 +00:00

Vectorize

fix: SLPVectorizer crashes for unreachable blocks containing not schedulable instructions.

2014-08-22 01:18:39 +00:00

CMakeLists.txt

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LLVMBuild.txt

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Makefile

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